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MAX10 supported DDR3 topology

lutzek
New Contributor I
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Hello,

 

I am working on my first implementation of DDR3 memory with MAX10 FPGA. My initial direction was to follow MAX10 FPGA Development Kit with 10M50DAF484C8G on board. The main difference is - I would like to use only one DDR3 memory chip - IS43TR16640C-125JBLI - the never revision of the one used on the kit.  

 

BUT.

In "Intel® MAX® 10 External Memory Interface User Guide" there is following information:

 

4.3.1. Intel MAX 10 Supported DDR2 or DDR3 Topology
For DDR2 or DDR3/DDR3L, the external memory interface IP for Intel MAX 10 devices
uses two capture clocks with two discrete devices.

lutzek_0-1693944625704.png

Figure 13. Supported Topology for DDR2 or DDR3 Memory Interfaces
This figure shows the supported DDR2/DDR3 topology. One clock captures the lower 16 bit of data and the other clock captures the top 8 bit of data. The memory interface IP in Intel MAX 10 devices generates DDR2 or DDR3/DDR3L IPs targeted for this configuration only.

 

Do I understand it correctly that it is not possible to use MAX 10 FPGA with single 16 bit DDR memory and If i want to use DDR3 I need to have second 8-bit part, even if my design requires 16 bits only?

 

Thank you for support

 

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AdzimZM_Intel
Employee
533 Views

Hello,


Yes you can.

The ECC bit is only set to 8-bit. So you cannot use 4-bit as ECC.


Regards,

Adzim


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AdzimZM_Intel
Employee
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Hello,


Do I understand it correctly that it is not possible to use MAX 10 FPGA with single 16 bit DDR memory and If i want to use DDR3 I need to have second 8-bit part, even if my design requires 16 bits only?

  • Yes, you need to create external memory interfaces to 16-bit SDRAM components with 8-bits error correction coding (ECC).


Regards,

Adzim


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lutzek
New Contributor I
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Hello Adzim, 

Thank you for your reply. Does it mean that if I do not plan to use ECC I can use only 16-bit DDR3? The Table 3 "Supported Maximum External Memory Interface Width in Intel MAX 10 Device Packages" shows that device I am using (F484 package) can work with DDR3 "with or without" ECC.

 

lutzek_1-1694030656978.png

 

I know that not using ECC sounds weird, but I in fact I need 12 bits out of this 16-bit message, so I have 4 bits left for error correction.

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AdzimZM_Intel
Employee
534 Views

Hello,


Yes you can.

The ECC bit is only set to 8-bit. So you cannot use 4-bit as ECC.


Regards,

Adzim


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AdzimZM_Intel
Employee
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I’m glad that your question has been addressed, I now transition this thread to community support. If you have a new question, feel free to open a new thread to get the support from Intel experts. Otherwise, the community users will continue to help you on this thread. Thank you.


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